Cai Jingxian, renowned as "Taobao's Pioneer Programmer," has departed from Alibaba to embark on a new journey as a technical partner at the burgeoning startup, Belianzhuguan. Established in 2021 by Lin Hao, who also boasts an impressive Alibaba background, Belianzhuguan specializes in cutting-edge areas such as big data, AI infrastructure, and cost management. Its flagship offerings, Sky DataPilot and Sky CostPilot, stand testament to the company's innovative prowess. Lin Hao, who holds an 86.6715% stake in the company, serves as its majority shareholder and de facto leader. In 2024, Belianzhuguan successfully secured its Pre-A round of funding, amassing tens of millions of yuan. Cai Jingxian, previously a key partner at Alibaba Group, played a pivotal role in the early days of Taobao. However, in 2023, he stepped down from his partnership role due to internal structural realignments within Alibaba.